The listed values are recommendations. Higher values should be used for higher glass loadings. We recommend only de-humidifying or vacuum dryers. Extensive drying can cause filling problems and surface defects.

Drying time

3 - 4 h

Drying temperature (τ ≤ -30°C)

120 - 140°C

Processing moisture

≤ 0,02%

Feed section

60 - 80°C

Temperature zone 1 - Zone 4

260 - 280°C

Nozzle temperature

260 - 290°C

Melt temperature

270 - 280°C

Mold temperature

80 - 100°C

Holding pressure, spec.

300 - 800 bar

Back pressure, spec.

30 - 100 bar

Injection speed

medium to high

Screw speed

8 - 15 m/min

Warning

Due to hydrolysis sensitivity of polyesters, a careful drying of the material before processing is very important. High residual moisture contents causes, in addition to surface defects, a decomposition of the molecular chains and thus reduced mechanical properties. If there are longer interruptions of the process, the cylinder temperature should be lowered. Furthermore, we recommend a thorough cleaning of the screw cylinder with extended dwell time or a material change. Glass-fiber-reinforced polyolefins (PE, PP) have established a particularly good cleaning effect.

Mechanical Properties

Tensile modulus (1 mm/min | ISO 527-2)

d.a.m.

10800 MPa

Stress at break (5 mm/min | ISO 527-2)

d.a.m.

170 MPa

Strain at break (5 mm/min | ISO 527-2)

d.a.m.

2,5 %

Charpy impact strength (23°C | ISO 179-1/1eU)

d.a.m.

60 kJ/m²

Charpy notched impact strength (23°C | ISO 179-1/1eA)

d.a.m.

11 kJ/m²

Flammability

Burning rate (UL 94)

0,8mm Wall thickness

HB Class

General properties

Density (23°C | ISO 1183)

1,56 g/cm³

Molding shrinkage (flow | ISO 294-4)

0,2 - 0,4 %

Molding shrinkage (transverse | ISO 294-4)

0,7 - 0,9 %

Disclaimer

All specifications and information given on this website are based on our current knowledge and experience. A legally binding promise of certain characteristics or suitability for a concrete individual case cannot be derived from this information. The information supplied here is not intended to release processors and users from the responsibility of carrying out their own tests and inspections in each concrete individual case. AKRO®, AKROMID®, AKROLEN®, AKROLOY®, AKROTEK®, ICX® and PRECITE® are registered trademarks of the Feddersen Group.